I have noticed that, on two-lane non-divided roads, the dividing line (separating you from oncoming traffic) is yellow, while the right-side solid line is white. White means it's safe to cross the line, but yellow means it's dangerous to cross it.
You can see that yellow line at the accident site.
Now, why didn't they start a new yellow line where the lane split? That would give drivers (and software) an important cue: if you are driving down a "lane" with a yellow line on the right, something is seriously wrong!
In the United States, "A yellow line (solid or dashed) indicates that crossing the line will place a driver in a lane where opposing traffic is coming at the driver."
You can see that yellow line at the accident site.
Now, why didn't they start a new yellow line where the lane split? That would give drivers (and software) an important cue: if you are driving down a "lane" with a yellow line on the right, something is seriously wrong!